<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>metadatademux</title> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="index.html" title="GStreamer Bad Plugins 0.10 Plugins Reference Manual"> <link rel="up" href="ch01.html" title="gst-plugins-bad Elements"> <link rel="prev" href="gst-plugins-bad-plugins-liveadder.html" title="liveadder"> <link rel="next" href="gst-plugins-bad-plugins-metadatamux.html" title="metadatamux"> <meta name="generator" content="GTK-Doc V1.13 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> <link rel="chapter" href="ch01.html" title="gst-plugins-bad Elements"> <link rel="chapter" href="ch02.html" title="gst-plugins-bad Plugins"> <link rel="chapter" href="ch03.html" title="gst-plugins-bad Classes"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> <tr valign="middle"> <td><a accesskey="p" href="gst-plugins-bad-plugins-liveadder.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td> <td><a accesskey="u" href="ch01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td> <th width="100%" align="center">GStreamer Bad Plugins 0.10 Plugins Reference Manual</th> <td><a accesskey="n" href="gst-plugins-bad-plugins-metadatamux.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td> </tr> <tr><td colspan="5" class="shortcuts"> <a href="#gst-plugins-bad-plugins-metadatademux.synopsis" class="shortcut">Top</a> | <a href="#gst-plugins-bad-plugins-metadatademux.description" class="shortcut">Description</a> | <a href="#gst-plugins-bad-plugins-metadatademux.object-hierarchy" class="shortcut">Object Hierarchy</a> | <a href="#gst-plugins-bad-plugins-metadatademux.properties" class="shortcut">Properties</a> </td></tr> </table> <div class="refentry" title="metadatademux"> <a name="gst-plugins-bad-plugins-metadatademux"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-metadatademux.top_of_page"></a>metadatademux</span></h2> <p>metadatademux — Send metadata tags (EXIF, IPTC and XMP) and remove metadata chunks from stream</p> </td> <td valign="top" align="right"></td> </tr></table></div> <div class="refsynopsisdiv" title="Synopsis"> <a name="gst-plugins-bad-plugins-metadatademux.synopsis"></a><h2>Synopsis</h2> <a name="GstMetadataDemux"></a><pre class="synopsis"> <a class="link" href="gst-plugins-bad-plugins-metadatademux.html#GstMetadataDemux-struct" title="GstMetadataDemux">GstMetadataDemux</a>; </pre> </div> <div class="refsect1" title="Object Hierarchy"> <a name="gst-plugins-bad-plugins-metadatademux.object-hierarchy"></a><h2>Object Hierarchy</h2> <pre class="synopsis"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstObject.html">GstObject</a> +----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html">GstElement</a> +----<a class="link" href="GstBaseMetadata.html" title="GstBaseMetadata">GstBaseMetadata</a> +----GstMetadataDemux </pre> </div> <div class="refsect1" title="Properties"> <a name="gst-plugins-bad-plugins-metadatademux.properties"></a><h2>Properties</h2> <pre class="synopsis"> "<a class="link" href="gst-plugins-bad-plugins-metadatademux.html#GstMetadataDemux--parse-only" title='The "parse-only" property'>parse-only</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write </pre> </div> <div class="refsect1" title="Description"> <a name="gst-plugins-bad-plugins-metadatademux.description"></a><h2>Description</h2> <p> </p> <div class="refsect2" title="Example launch line"> <a name="id393899"></a><h3>Example launch line</h3> <p> This element parses image files JPEG and PNG, to find metadata chunks (EXIF, IPTC, XMP) in it, and then send individual tags as a 'tag message' do the application and as 'tag event' to the next element in pipeline. It also strips out the metadata chunks from original stream (unless the 'parse-only' property is set to 'true'). In addition the whole metadata chunk (striped or not) it also sent as a message to the application bus, so the application can have more controls about the metadata. </p> <p> </p> <pre class="programlisting"> gst-launch -v -m filesrc location=./test.jpeg ! metadatademux ! fakesink silent=TRUE </pre> <p> </p> <pre class="programlisting"> GST_DEBUG:*metadata:5 gst-launch filesrc location=./test.jpeg ! metadatademux ! fakesink </pre> <p> </p> <p> </p> <pre class="programlisting"> val = gst_tag_list_get_value_index (taglist, GST_TAG_EXIF, 0); if (val) { exif_chunk = gst_value_get_buffer (val); if (exif_chunk) { ed = exif_data_new_from_data (GST_BUFFER_DATA (exif_chunk), GST_BUFFER_SIZE (exif_chunk)); } } </pre> <p> This same idea can be used to handle IPTC and XMP directly by using libdata and exempi (or any other libraries). Notice: the whole metadata chunk sent as a message to the application contains only metadata data, i.e. the wrapper specific to the file format (JPEG, PNG, ...) is already striped out. </p> </div> </div> <div class="refsect1" title="Details"> <a name="gst-plugins-bad-plugins-metadatademux.details"></a><h2>Details</h2> <div class="refsect2" title="GstMetadataDemux"> <a name="GstMetadataDemux-struct"></a><h3>GstMetadataDemux</h3> <pre class="programlisting">typedef struct _GstMetadataDemux GstMetadataDemux;</pre> <p> The opaque <a class="link" href="gst-plugins-bad-plugins-metadatademux.html#GstMetadataDemux"><span class="type">GstMetadataDemux</span></a> data structure.</p> </div> </div> <div class="refsect1" title="Property Details"> <a name="gst-plugins-bad-plugins-metadatademux.property-details"></a><h2>Property Details</h2> <div class="refsect2" title='The "parse-only" property'> <a name="GstMetadataDemux--parse-only"></a><h3>The <code class="literal">"parse-only"</code> property</h3> <pre class="programlisting"> "parse-only" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre> <p>If TRUE, don't strip out any chunk.</p> <p>Default value: FALSE</p> </div> </div> <div class="refsect1" title="See Also"> <a name="gst-plugins-bad-plugins-metadatademux.see-also"></a><h2>See Also</h2> <span class="type">metadatamux</span> </div> </div> <div class="footer"> <hr> Generated by GTK-Doc V1.13</div> </body> </html>